Harrow-tooth fastener.



PATENTBD' JUNE 9, 1903. W. DB L. WHITNEY. HARROW TOOTH FASTENER.

APPLICATION FILED SEPT. 18' 1902.

N0 MODEL.

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PATENT OFFICE.

HARROW-TQOTH F'ASTEN ER.

srncirIcA'rIon forming part of Letters'Patcnt No. 730,725, dated June 9, 1903.

. Application filed eptember 18 1902. Serial No. 123,918. (No model.)

To all whont it innay concern.-

Be it known that I,WILL1E DE LANo WHIT- NEY, a citizen of the United States, residing at Holley, in the county of Orleans and State of New York, have invented a new and useful Harrow-Tooth Fastener, of which the follow-. ing is a specification;

This invention relates to barrow-tooth fasteners; and it has for its object to provide a device of this class applicable especially to double-pointed teeth which shall possess 'superior advantages in point of simplicity, durability, and general efficiency and by the use of which the barrow-tooth secured thereby may be readily detached, reversed, and secured in operative position.

With these ends in view the invention consists in an improved clamp having a fasten-' ing-bolt and a wedge shaped fastening device mounted upon said bolt and in the improved construction of the cooperating harrow-tooth, which will be hereinafter fully described, and particularly pointed out in the claims.

In the drawings, Figure l is a vertical sectional view showing a reversible barrow-tooth secured in operative position by my improved fastening device. Fig. 2 is a sectional view taken on the line 2 2 in Fig. 1. Fig. 3 is a perspective view of the barrow tooth detached. Figs. 4 and 5 are perspective views showing, respectively, theclip or clamp and the bolt for the same. Figs-6 and 7 are perspective views showing different forms of wedges or fasteners used in connection with my invention.

Corresponding parts in the several figures are designated by similar characters of reference.

While my invention is applicable to many different forms of barrow-teeth, I have in the drawings shown it applied to an ordinary reversible or double cultivator point. ,flhis, which is designated 1, has the two points 2 2, which in this case are of similar construction, although it is obvious that differently-constructed points may be used. These points 2 2 are connected by an intermediate shank 3, which is narrower than the adjacent edges of the points, so that recesses 4 4 shall be formed at the intersection of the points with said connecting-shank. The latter is-bulged,

as shown, forming upon the face thereof a concavity '5, the purpose of which will be presently made evident.

My improved fastener; comprises a clip 6, the central member-of which is convex upon its inside, as shown at 7, so as to fit the concavity 5 of the reversible point. The arms 8 8 of the clip 6 are provided with perforations 9, one of whichis threaded to receive the threaded end of a cylindrical connecting-bolt 10, which latter, as will be seen in Fig. 5 of the drawings, consistsof a smooth cylindrical rod, threaded only at one of its extremities, as shown at 11, and having at its opposite end a notch 12. to receive the point of a screw-' driver, whereby it may be secured in operative position. The dimensions of the clip 6 aresuch that when the convex face of its transverse bar 13 engages the concavity 5 of the harrow tooth or point the arms 8 8 shall snugly engage the recesses 4. in the sides of the tooth, so as to present a smooth and finished surface.

14: designates the wedge member, which is composed of wedge shaped ends 15 15,'which are suitably connected, the connecting means (illustrated in Figs.1, 2,and 6) being composed of side members 16 and top and bottom members 17 and 18, said side members being provided with wedge-shaped projections 19, disposed in alinement with the wedge-shaped ends 15, so as to form an extended bearingsurface. In Fig. 7 the wedge-shaped ends 15 have been shown as being connected only by the top bar 17, the end members 15 being relied upon to form a sufficient bearing or engaging-surface. In either case the members 15 are provided with slots 19' to engage the bolt 10.

The operation of the invention will be readily understood from the foregoing description taken in connection with the drawings hereto annexed. When the parts are connected and the wedge member withdrawn to the position shown indotted lines in Fig. 1, where it is shown as depending from the bolt 10, the bar 20, to which the harrow-tooth is to be secured, may be readily inserted between the said tooth and the wedgemember, the space between the latter and the rear side of the barrow-tooth being ample for such adjustment or assemblage of the parts. By

simply reversing the position of the wedge and driving it home the parts will be s'ecurely connected or locked together, the bulged portion 3 of the, tooth performing an important function in so engaging the bar 20 as to form a seat for itself from which displacement by ordinary means is practically impossible. To effect the removal or reversal of the tooth, the wedge member is simply loosened, when the parts may be separated.

It is obvious that this invention is applicable not only to barrow-teeth, but in many cases to plow and cultivator points as well. It will also be understood that it may be employed not only for securing the. reversible point to a frame member, but to another harrow-tooth as well, as is frequently done, for instance, in spring-tooth harrows. Let it be further understood that the invention is applicable to single as well as to reversible points.

I have in the foregoing described the preferred form of my invention; but I would have it understood that I do not limit myself as regards structural details, but reserve the right to such changes and modifications as lie within the scope of my invention and which may be resorted to'without detracting from the utility of the same.

Having thus fully described my invention, what I claim is 1. A tooth for cultivating implements having a transverse concave bulge, in combination with a clip constituting a fastening member having a transverse convex bar to engage said bulge.

2. A tooth for cultivating implements having a transverse concave bulge and recesses adjacent thereto, in combination with a clip constituting a fastening member having a transverse convex bar to engage said bulge, and arms engaging said recesses.

3. A tooth for cultivating implements having recessedsides in combination with a clip constituting a fastening member, the arms of said clip engaging said recesses.

4. A tooth for cultivating implements having a transverse concave bulge, in combination with a clip constituting a fastening mem her having a transverse convex bar to engage said bulge, a cylindrical bolt connecting the arms of the clip and a slotted wedge member mounted upon said bolt;

5. A tooth for cultivating implement-s having a transverse concave bulge and recesses adjacent thereto, in combination with a clip constituting a fastening member having a transverse convex bar engaging said bulge, and arms engaging said-recesses, a cylindrical bolt connecting'the arms of said clip and a slotted wedge member mounted adjnstably upon said bolt.

6. A reversible tooth for cultivating implements having a transverse concave bulge disposed between the points, and recesses in the edges of said tooth member adjacent to such concavity, in combination with a clip constituting a fastening member, said clip having a convex-faced cross-bar engaging the concavity of the tooth, and arms engaging the recesses in the edges thereof, a cylindrical bolt connecting said arms and a slotted wedge member mounted adj ustably upon said bolt.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence of two witnesses.

WILLIE DE LANO WHITNEY. Witnesses:

WM. V. VAN RENSSELAER, MORTIMER BEACH. 

